671610001 has 4 divisors (see below), whose sum is σ = 680810212. Its totient is φ = 662409792.

The previous prime is 671609989. The next prime is 671610013. The reversal of 671610001 is 100016176.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (671609989) and next prime (671610013).

It can be written as a sum of positive squares in 2 ways, for example, as 239011600 + 432598401 = 15460^2 + 20799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671610001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671610601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4599996 + ... + 4600141.

It is an arithmetic number, because the mean of its divisors is an integer number (170202553).

Almost surely, 2^671610001 is an apocalyptic number.

It is an amenable number.

671610001 is a deficient number, since it is larger than the sum of its proper divisors (9200211).

671610001 is an equidigital number, since it uses as much as digits as its factorization.

671610001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9200210.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 671610001 is about 25915.4394328941. The cubic root of 671610001 is about 875.7343499410.

Adding to 671610001 its reverse (100016176), we get a palindrome (771626177).

The spelling of 671610001 in words is "six hundred seventy-one million, six hundred ten thousand, one".